(Reaffirmed 2002) I!3 : 8966 - 1978 Indian Standard SPECIFICATION FOR MAGNESITE NOZZLES liefractories Sectional Committee, SMDC 18 Chairman DR S. P. VARMA Rekresenting Directorate General New Delhi of Technical Development, Members SHRI R. V. BAINDOOR Associated Cement Cos Ltd, Bombay SHRI M. R. VINAYAKA ( Alternate I ) SHRI J. V. JOSHI ( Alternate II ) Association of Indian Engineering Industry ( IndusSHRI N. K. BHAMBHANE trial Furnaces Division ), Bombay SHRI B. N. BHASKAR Ishwar Industries Ltd, New Delhi SHRI VIVEK N. BHASKAR (Alternate) SHRI D. K. CHATTERJEE M. N. Dastur & Co (P) Ltd, Calcutta SHRI R. C. NANDY ( Alternate ) CHEMIST & METALLURGIST, NF Ministry of Railways RAILWAY, BONGAIGAON CHEMIST & METALLURcWT-II RESEARCH, DESIGNS 8s STANDARDS ORGANIZATION, LUCKNOW( Alternate ) SHRI B. K. P. CHIBBAR Steel Authority of India Ltd ( Bokaro Steel Ltd ), Bokaro SHRI A. S. KHALKHO ( Alternate ) SHRI M. H. DALMIA Orissa Cement Ltd, Rajgangpur SHRI K. K. PRASAD ( Alternate ) DR S. S. GHOSE Belpahar Refractories Ltd, Belpahar DR A. K. BOSE ( Alternate ) Directorate General of Supplies & Disposals, SHRI A. K. GUHA New Delhi SHRI B. B. BANERJEE ( Alternate ) SHRI R. K. GUPTA All India Glass Manufacturers Federation, New Delhi SHRI RAMESH CHAND ( Alternate ) Steel Authority of India Ltd (Alloy Steel Plant ), SHRI A. V. HINGORANI Durgapur SHRI S. K. JHUNJHVNWALA Orissa Industries Ltd, Rourkela SHRI M. M. SAHU ( Alternate ) Directorate General of Technical Development, SHRI S. R. KHANNA New Delhi ( Continued on baee 2 ) ~____ @ copyright 1979 INDIAN STANDARDS INSTITUTION This publication is protected under the. It&n Cofipriiht Act (XIV of 1957 ) and reproduction in whole or in part by any means exce t with written permission of the publiiha rhall be deemed to be an infringement o F copyright under the said Act. IS I 8966 - 1978 page 1 ) Representing Steel Authority of India Ltd ( Rourkela Steel Plant ), Rourkela Ministry of Defence ( DGOF ) ( Cwhnucdfrom Members SHRI I. C. MODI SHRI D. Y. Moome SHRI S. K. MOHANTY ( Alternate ) Behar Firebricks & Potteries Ltd, Mugma, Dhanbad SHRI K. N. MUKHERJEE SHRI S. N. BANERJEE( Alternate ) India Firebricks & Insulation Co Ltd, Marar, SHRI N. C. MUKHERJEE Hazaribagh SHRI V. S. BHUTA (Alternate) Harry Refractory & Ceramic Works Pvt Ltd, SHRI J. R. K. MURTI~Y Calcutta, and Indian Refractory Makers Association, Calcutta Harry Refractory & Ceramic Works Pvt Ltd, SHRI A. BASU ( Alternate ) Calcutta Kumardhubi Fireclay & Silica Works Ltd, Calcutta DR D. N. NANDI SHRI P. N. MOHANTY ( Alternate ) Engineering & Mineral Industrial Research LaboraSHRI P. S. NARAYANA tory, Bangalore SHRI P. S. V. ANANTHANARAYANA( Alternate ) Dalmia Institute of Scientific & Industrial Research, DR J. D. PANDA Rajganjpur Engineers India Ltd, New Delhi DR T. V. PRASAD Metallurgical & Engineering Consultants ( India ) SHRI B. RAMACHANDRAN Ltd, Ranchi SHRI T. B. SINGH ( Alternate ) Tata Iron & Steel Co Ltd, Jamshedpur DR B. RAO SHRI B. N. GHOSH ( Alternote ) SteelBz;yty of India Ltd (Bhilai Steel Plant), SHRI B. V. A~PA RAO SHRI S. ,K. MUKHERJEE ( Alternate ) ( CSIR ), Laboratory National Metallurgical DR M. R. K. RAO Jamshedpur SHRI P. C. SUN ( Alternate ) National Test House, Calcutta SHRI A. K. SAISA SHRI D. KANUNGO( Alternate ) Steel Authority ofIndia Ltd ( Durgapur Steel Plant ), SHRI 0. P. SANDHIR Dureanur SHRI S. K. CHATTERJEE( Alternate ) Bharat Heavy Electricals Ltd, Tiruchchirappalli SHRI R. SANKARAN SHRI Cl. S. R. ADITHYAN ( Aliernate ) Central Glass & Ceramic Research Institute ( CSIR ), DR N. R. SIRCAR Calcutta SHRI S. K. GHOSH (Alternate) Directorate of Production & Inspection (Navy), CDR V. S. VERMA Ministry of Defence ( DGI ) SHRI S. C. PAUL ( Alternate ) Director General, IS1 ( Ex-o$icio Mcm her ) SHRI C. R. RAMA RAO, Director ( Strut & Met ) Secretary SHRI J. SARIN Assistant Director ( Metals), IS1 2 1s : 8966 - 1998 Indian Standard SPECIFICATION FOR MAGNESITE NOZZLES 0. FOREWORD 0.1 This Indian Standard was adopted by the Indian Standards Institution on 27 October 1978, after the draft finalized by the Refractories Sectional Committee had been approved by the Structural and Metals Division Council. 0.2 A perfect nozzle permits teeming of entire cast rate without splashing on the sides of ingot mould nating the metal. The nozzle should also maintain stopper head so that no dribbling occurs while the from one mould to the other. of metal at a constant and without contamia perfect seating for the ladle is being removed for apparent ' 0.3 Data is being collected to finalize the requirements porosity and surface defects of magnesite nozzles. 0.4 Requirements for fireclay nozzles are covered in IS : 4564-1968*. 0.5 In the preparation of this standard, assistance has been derived from GOST 5500-1974 `High duty and super duty refractories for steel pouring' issued by Gosudarstvennyj Komitet Standartov, Mer i Izmeritel'nyh Priborov SSSR `( USSR ). 0.6 This standard keeps in view the manufacturing followed in the country in this field. and trade practices 0.7 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : 2-19607. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard, 1. SCOPE 1.1 This standard ladles in foundries covers the requirements and steel plants. for magnesite nozzles for use in *Specification for fireclay nozzles. *Rules for rounding off numerical values ( mised ). 3 tS : 8966 - 19% 2. SUPPLY OF MATERIAL 2.1 General requirements relating to the supply of magnesite nozzles shall be as laid down in IS : 1387-1967*. 2.2 The nozzle shall be compact, of homogeneous texture and free from cracks, voids and other flaws. They shall be burnt evenly throughout, shall have no soft corners and shall have sufficient mechanical strength. The contour of the place where the stopper head will sit, shall be checked by a template to find out whether the proper contour according to the drawing has been maintained. 3. TERMINOLOGY 3.1 For the purpose of this standard the definition given in IS : 4041-1967t and the following shall apply. 3.1.1 Conicity - It is the ratio of the difference between the upper and lower diameter of cylindrical surface, to the height of said surface. 4. SIZES AND TOLERANCES 4.1 The shapes and sizes of the nozzles shall be as agreed to between the manufacturer and the purchaser. 4.2 Tolerances shall apply: a) The following tolerances on the sizes of the nozzle On diameters of nozzles: Up to 50 mm Over 50 and up to 100 mm Over 100 mm For products manufactured dry press process by the f 1 mm f2mm f 1 percent or 2 mm whichever is greater 2 percent 2mm 3 percent 0.013 For products manufactured by the plastic method b) On height of seat for insert c) On height, length and width of nozzle d) Conicity in the height of cylindrical and prismatic surfaces of products, Max *General requirements for the supply of metallurgical tGlossary of terms relating to refractory materials. f f f materials (first revision). 4 IS : 8966 - 1978 5. CHEMICAL COMPOSITION 5.1 The material shall contain a minimum of 85 percent MgO. a suitable Indian Standard is published for the method of chemical NOTE-Till analysis of MgO, the determination of MgO shall be as agreed to between the purcbaser and the manufacturer. 6. BULK DENSITY 6.1 When tested in accordance with IS : 1528 ( Part XII )-1974*, the minimum bulk density of the material shall be not less than 2.4 g/ml and not more than 2'85 g/ml. The exact minimum value shall be mutually agreed between the manufacturer and the user depending upon usage. 7. SAMPLING ' AND CRITERIA FOR CONFORMITY 7.1 Representative samples shall be drawn according to the scheme of sampling given in IS : 1528 ( Part VII )-19747 for carrying out tests specified in this standard and criteria for judging the conformity of the product to the specification shall be as laid down in the above specification. 8. MARKING 8.1 Each nozzle shall be clearly marked with the manufacturer's trade-mark. 8.1.1 name or The nozzle may also be marked with the ISI Certification Mark. use of the IS1 Certification Mark is governed by the provisions of the NOTE -The Indian Standards Institution ( Certification Marks ) Act and the Rules and Regulations made thereunder. The IS1 Mark on productr covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by IS1 and operated by the producer. IS1 marked products are also continuously checked by IS1 for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the ISI Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution. *Methods for sampling and physical tests for refractory nation of bulk density (Jirst nvisian). tMethods for sampling and physical tests for refractory of sampling and criteria for conformity (first rwision ). materials: materiala: Part XII Part VII DetermiMethoda 5 INDIAN ON STANDARDS REFRACTORIES 8-1967 195-1963 483-1972 484-1958 1292-1958 1335-1959 1522-1967 1523-1972 1524-1968 1525-1968 1526-1960 1527-1972 1528 (Part 1528 1528 1528 1528 1528 1528 1528 1528 1528 1528 1528 1528 Part Part Part Part Part Part Part Part ( Part ( Part (Part ( Part 1528 (Part 1529-1971 1748-1961 1749-1972 1750-1961 1751-1968 2042-1972 2043-1963 2044-l 962 2045-1962 3304-1965 3305-1965 4041-1967 4564-1968 4565-1968 4801-1968 4812-1972 4813-1968 4814-1968 5495-1969 6727-1972 6728-1972 7199-1974 Moderate heat duty Breclay refractories, Group A (thirdrevision) Moderate heat duty fireclay refractories, Group B ( third revision ) High heat duty fireclay refractories (third revision ) Fireclay mortar for laying fireclay refractory bricks (second r&ion ) Fireclay refractories for oil-fired boiler furnaces of naval ships (first revision ) Silica refractories for general purposes (revised ) Mortar for laying silica bricks Methods for the direct determination of alumina in refractory materiala ( tentative ) Fireclay glass tank blocks (Jirst revision ) Bottom-pouring refractories for steel plants (first revision) Refractory sleeves (Jirst revision) Ladle refractories for steel plants (first revision ) Sizes and shapes for firebricks ( 230 mm series ) Methods for chemical analysis of high silica refractory materials (Jlrst revision) I )-1974 Methods of sampling and physical tests for refractory materials: Part I Determination of pyrometric cone equivalents ( PCE ) or softening point (jir5t revirion ) II J-1974 Determination of refractoriness under load (first revision ) IIf)Determination of spalling resistance (&St &&ion ) ' IV )-1974 Determination of cold crushing strength (Jirst revision) V )-1974 Determination of modulus of rupture (jirst revision) VI )-1974 Determination of permanent change after reheating (first ret&ion ) VII )-1974 Methods of sampling and criteria for conformity (Jirst revision) VIII )-1974 Determination of apparent porosity (first revision ) IX )-1974 Determination of true specific gravity and true density (first rmision ) X )-1974 Determination of sizes of refractory bricks (jrst revision) XI )-1974 Determination of warpage (Jirst revision ) XII)-1974 Determination of bulk density (Jirst r&&n ) XIII)-1974 Determination of resistance to disintegration effect of carbon monoxide (firrt revision ) XIV )-1974 Sieve analysis (jirstrrvisidn) Blast furnace refractories for steel plants (first revision ) Sizes of graphite crucibles Magnesite refractories (first revision ) Dead-burned pea magnesite Fireclay cupola refractories (first revision ) Insulating bricks (first revision ) Siliceous fireclay refractories Sillimanite refractories for glass melting tank furnaces Natural sillimanite blocks for glass melting tank furnaces Burnt magnesite-chrome refractories for general purposes Burnt chrome-magnesite refractories for general purposes Glossary of terms relating to refractory materials Fireclay nozzles Fireclay stoppers Chemically-bonded magnesite-chrome refractories for roof lining Silica refractories for coke oven (Jrst revirivn ) Chemically-bonded chrome-magnesite refractories for general purposes Chemically-bonded magnesite-chrome refractories for general purposes Sizes and shapes for firebricks ( 300 mm and higher series ) Fireclay checker-bricks for open-hearth furance Recuperator tubes, tiles and collars for soaking pits in steel plants Blast furnace stove refractories